"Upward trends in photochemical oxidants and climate change in summer in the greater Tokyo region" 

Hiroshi Yoshikado¹, Takahiro Tsubaki²

¹National Institute of Advanced Industrial Science and Technology
²Japan Weather Association

13th World Clean Air and Environmental Protection Congress (London  2004/8/26)

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Abstract

In the greater Tokyo region, photochemical oxidant Ox concentrations have shown clear upward trends during the recent decade. The most striking observation is the frequent occurrences of afternoon peaks above the warning level in summer.

 The results of our study appear to implicate climate change, either local or global, as one possible cause for the observed increase in the occurrence of high Ox concentration values in summer.

Keywords

photochemical oxidants, climate change, greater Tokyo region, weather pattern, local wind